V-slot paper cutter



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Feb. 4, 1936. J. E. LEE ET AL V-SLOT PAPER CUTTER Filed Aug. 26, 1935 Patented F 4, 1936.

UNITED STATES PATENT OFFICE V- SLOT PAPER CUTTER of Michigan Application August 26, 1935, Serial No. 37,788

9 Claims.

' have either diametrically disposed slots extending from the drilled holes to the adjacent edge of the paper; or slots of any desired width cut from the hole to the edge of the paper, the slots having parallel sides; or there may be slots cut from the holes to the adjacent edge of the paper having sides which diverge from each other outwardly. The present invention is concerned with an improvement in the attachment shown in the prior application, Serial No. 755,672, filed December 3, 1934. It is a primary object and purpose of the present invention to provide a simple attachtment by means of which the three characters of cuts described above may be easily and readily produced, such attachment being of a simple character and very readily secured in place on the paper drilling machine, utilizing the gauge stop shown in Patent No. 1,928,383, issued September 26, 1933, to-

gether with the improvements therein which are shown in the pending application for patent above identified.

An understanding of the invention for the attainment of the ends stated, as well as others not at this time specifically enumerated, may be had from the following description,.taken in connection with the accompanying drawings, in which,

Fig. 1 is a fragmentary plan view showing the attachment of our invention applied to the table and back stop thereon of a paper drilling machine.

Fig. 2 is a fragmentary elevation, partly in section, showing the position of the slitting attachment on the paper drilling machine. Fig. 3 is a fragmentary vertical section illustrating one manner in which the cutting knife is releasably held in its angular positions.

Figs. 4, 5 and 6 are transverse sections taken respectively on the lines 4l, 5-5 and 6-6 of Fig. 3, looking in the directions indicated by the arrows.

Fig. 7 is a view similar to Fig. 6 illustrating the manner in which angularly disposed sides of slots are cut.

Fig. 8 is a fragmentary elevation of the notched bar which is attached to the back stop of the machine, showing the two grooves or recesses for properly guiding the cutting knife in its angular positions.

Fig. 9 is a view similar to Fig. 3 showing a modification in construction.

Figs. 10 and 11 are, respectively, a fragmentary plan and an elevation of a modified form of knife pOsiitIOILlng bar to be attached to the back stop, an

Figs. 12, 13 and 14 are, respectively, plans of 5 cards which have been cut, the first slitted, the second with slots having parallel sides and the third with slots having outwardly diverging sides.

Like reference characters refer to like parts in the different figures of the drawings. m

In a paperdrilling machine there is a horizontal table I mounted upon which is a back stop 2 in the form of an elongated bar having a vertical face against which a pack of cards or of paper is placed so as to properly gauge the same for the 15 drill to drill holes therein. With our invention an auxiliary bar is detachably secured against the vertical face of the back stop bar 2. The auxiliary bar 3 is of substantially rectangular shape in cross section and has connected thereto 20 attaching devices 4, in the form of U-shaped brackets permanently secured at one end of the upper side of the bar 3 andextending over the back stop bar 2, with thumb screws 5 for clamping the same in place as best shown in Fig. 2. 25 The bar 3 intermediate its ends is vertically slotted to provide two spaced apart vertical slots 6 which are separated by a narrow finger. At its underside below the slots 6 and the spacing finger the bar is cut away providing an opening 30 through and underneath the bar as shown in Fig. 8 for passage of paper cut away in slotting the sheets or cards.

The pack of cards or sheets of paper is also properly gauged at one side so as to position the 35 same for drilling the holes through the paper and for cutting the same to provide the slit or slots desired. The gauged stop for paper drills illustrated in Patent No. 1,928,383, is used with this machine, one rod indicated at 8 only being 40 shown, but it is to be understood that the gauge stop will be of the character shown in the above identified patent so that the paper or card pack may be properly located at several difierent positions for the drill to drill the several spaced holes 45 therethrough required. The immediately engaging element for one side edge of the cards shown at 9 having an adjustable bar ill extending therefrom toward the paper pack (Fig. 1), and with a vertical rod ll mounted at the outer end thereof 50 having a flat face against which the pack engages is used, and is identical in construction and operation with the paper gauge element shown and described in application, Serial No. 755,672.

The paper or card pack II a is first drilled in 65 are to be cut from the drilled openings to the adjacent edges of the paper or cards, the auxiliary bar 3 is attached to the back stop 2 bringing the edge portions of the pack over a wooden blo'ck I3 which is set with its upper side flush with the upper side of the table, as shown in Fig. 2, and against which the cutting edge of the knife engages in the operation of the slot or slot cutting. In paper drilling machines, like that illustrated in the application, Serial No. 755,672, and as used herein, a short distance above the spindle of the machine which carries the drill there is a horizontal arm I4 to the outer end of which the cutting knife assembly is secured. This cutting knife assembly includes a vertical bar I5 having laterally projecting ears I6 through which cap screws are passed into the outer end of the arm I4. At

its lower end bar I5 has inwardly extending horizontal spaced apart arms I1 which pass one to each side of the spindle I8 of the drill. The bar I5 at its upper and lower ends has outwardly extending arms I9 and 20 serving as guides for a vertical presser bar 2I square in cross section, the arms 20 being divided and properly recessed to receive the presser bar 2I (Fig. 4) The bar is held in said recesses by suitable transverse clamping bars such as shown in Fig. 4 held in place by suitable bolts or screws. A stop member 22 is fastened to the presser 2I above which and around the presser bar 2I is a coiled compression spring 23, the upper end of which bears against the lower side of the arm I9, so as to yieldingly hold the stop 22 against the upper side of the arm 20. At the lower end of the bar 2I a horizontal foot member 24 is permanently secured which extends toward the back stop 2, and at its free end is divided making a slot 25 as shown.

At the underside of the arms I1 a plate 26 is bolted which has a centrally disposed opening therein surrounded by a sleeve 21. A U-shaped guide is bolted to the underside of the outer portion of the plate 26. Such outer portion of the plate 26 has a recess at its underside extending from the sleeve 21 outwardly and two spaced apart holes 29 are drilled upwardly through the plates 26 in said recess. The legs 28 of the U- shaped guide member are connected at their outer ends by a cross bar 30 which is spaced below the recessed portion of the plate 23 whereby there is provided a guide for the entrance of a bar into said recess and for holding the same in place, the purpose of which will later be described.

In the slitting knife construction a cylindrical rod 3| is used which, at its upper portion, has a collar 32 to bear against the underside of the sleeve 21 (Fig. 3), above which the diameter of the rod is enlarged as'indicated at 33 to pass through the opening surrounded by the sleeve 21, and terminates at its upper end in a screw threaded section 34, adapted to receive a securing nut 35 which is threaded onto the part 34 and against a suitable spacing washer and collar as shown in Fig. 3, thus releasably securing the rod 3I and the parts attached thereto in place. From a side of the rod 3| a cutting blade 36 extends radially outward, the lower edge 31 thereof being sharpened to a cutting edge. The opposite vertical edge of the blade 36 is connected to a rod 33 in the upper end of which a longitudinal hole is bored to receive a ball 33 and a spring 43 below the ball to press the same upward, providing a releasable ball catch which may enter the lower end of either one of the openings 23 previously described and releasably hold the cutting blade in two different angular positions, one of which is shown in Fig. 4. If instead it is desired that the cutting blade be held in the position shown in Fig. 5, a slide block H is inserted above the cross bar 30. This slide block at its inner end is notched or grooved as shown at 42 so as to embrace theopposite sides of the rod 33 thereby holding the cutting blade in the central position shown in Fig. 5.

For slitting the cards from the drilled openings I2 directly outward to the adjacent edges of the cards or paper, as at 43 in Fig. 12, the cutting blade 36 is held by the member 4I shown in Fig. 5. The table with the pack thereon is elevated bringing the cards against the cutting blade edge 31. The bar 3 is positioned so that when the table I is lifted the rod 33 of the cutting blade assembly will pass into one of the grooves or recesses 6. The rod 3| will pass through the drilled openings at I2. The pressure foot member 24 at the lower end of the pressure rod 2| engages against the upper side of the sheet pack and is lifted upwardly with a compression of the spring 23 securely gripping the pack which is being cut and holding it against displacement.

To cut diametrically disposed slots, such as indicated at 44 in Fig. 13, the paper gauge member indicated at 3, I0 and II is adjusted so that the paper is first cut a little to one side of the diameters of the drilled openings I 2, and then the process is repeated with the gauge at II adjusted so that the paper is cut to the opposite sides of said diameters, thus providing a slot having a definite width instead of a single diametrically disposed slit such as shown at 44 in Fig. 12.

To cut slots having outwardly diverging sides, indicated at 45 in Figs. 7 and 14, the bar 3 is adjusted to a position such that the finger between the two spaced apart grooves 6 is in the same vertical plane with the recess 25 in the free end of the pressure foot member 24 (Fig. 1). The knife is turned to one side, for example, as in Fig. 4, and is yieldingly held in such position by' the engagement of the ball catch 39 in an opening 29 directly above it. As the table is'elevated the rod 36 will then enter one of the vertical grooves 6 as illustrated in Fig. 4 and one side 45 of the slot will be cut. Such side of the slot is cut with respect to all of the drilled openings I2, utilizing the gauge stop shown in Patent No. 1,928,383 after which, the table being lowered, the knife is swung over to the opposite angular position and the process repeated to cut the oppositesides 45 of the slots. In such case the rod 33 will then be guided in the other vertical groove 6 during the cutting operation.

In Figs. 9, l0 and 11 a modification in structure is shown. The bar 3 is replaced by a similar bar 3a which has, similarly, two spaced apart vertical grooves 6 therein separated by a finger 6a as shown. Projections 46 extend above the upper side of the bar, the width thereof at the 'outer sides of the two grooves or slots 6. There will also be a third upper projection 41 spaced from one of the projections 46 and there is provided a third vertical slot 43 paralleling the slot 3 between the projection 46 and the adjacent projection 41. This latter slot 43 will be the one used when the paper is to be slitted to provide the diametric slits 44 shown in Fig. 12 or for cutting slots having parallel sides while the two grooves 6 will be used for the diverging sides 45. The plate 26 previously described is replaced by'a plain plate 26a, (Fig. 9), while the rod 38 at the outer edge of the cutting blade 36 is replaced by a rod 38a which does not carry any releasable ball catch at its upper end. This is not necessary as the projections 46 and 41 serve to hold the cutting blade against accidental movement before guide grooves 6 are reached and the upper side of the paper pack is engaged by the knife edge, I

It is accordingly apparent, with the invention which we have made, that upon the same machine packs of paper or of thin cards may first be properly drilled and then either slitted as shown in Fig. 12, or slotted with either parallel or diverging sides as shown in Figs. 13 and 14, the result being obtained by the use of a very simple attachment to the machine. There may be a very rapid slitting or slotting of the sheets through the provision of a relatively simple and inexpensive attachment to the regular paper drilling machine. It is apparent, however, that the slitting and slotting elements of this invention are capable of use without necessarily being attached to the same machine which drills the holes so that the holes may be drilled with one machine and the slitting or slotting done with another machine. However, for practical purposes it is more economical to use the attachment, upon the regular paper drilling machines.

It is also to be appreciated that the cutting blade 36, see Figs. 9, 10 and 11, may be varied relative to the back edge of the pack of sheets Ila and thus the size of the trapezoidally shaped slot varied. In other words, the reinforcing rod 38a is positioned in its particular slot 6 a greater or less distance and thus the sides 45 of the slots, see Fig. 13, although remaining at the same angular relationship to one another, are located a greater or lesser distance apart. To obtain this adjustment, the back gage proper may be moved in either direction or, if desired, a spacing strip of predetermined width may be inserted between the back gage 2 and the spacing bar 3 and thus moving the cutting blade 36 toward the rear side of the pack of paper and the reinforcing bar 3| toward the rear of the drilled hole 12. Thus the opening to the drilled hole I2 is diminished in sizes The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope,

We claim:

1. In a drilling machine of the class described adapted to drill and cut a plurality or pack of sheets or the like having a table adapted to receive said sheets,a support above the table, and a drill removably mounted on the support, said drill being adapted to out the said sheets, the combination of a back gauge mounted upon the table, said sheets being located against the gauge whereby they may be drilled, a slitting mechanism movably attached to the said support, said drill being removed when the slitting mechanism is attached in position, said slitting mechanism having a pivoted blade rotatable to two positions and means of predetermined dimension adapted to be inserted between the back gauge and the sheets whereby the two slots which may be cut by the slitting mechanism are positioned in a predetermined relationship relative to the first out which is made in the sheets.

2. A combination of elements as recited in claim 1 but also having yieldable locking means for maintaining the pivoted blade in either of its positions.

3. In a construction of the class described having a table adapted to receive material having an opening formed therein, a bar located adjacent the material, a cutting blade, above said work table, having a lower cutting edge, a stiffening member extending along one edge of said blade, means for relatively moving the blade so that the stiffening member moves through the opening in the material and-means for shifting the cutting edge of the blade whereby angularly positioned cuts through the material may be made.

4. In a construction as set forth in claim 3 in which the cutting blade has a second stiffening member spaced from the first stiffening member.

5. In a construction as set forth in claim 3 in which the said bar has two grooves therein, the cutting blade having a portion movable in a predetermined one of the grooves.

6. In a construction as set forth in claim 3 in which the said bar has two grooves therein, the cutting blade having a portion movable in a predetermined one of these grooves and also adjustable into and out of said groove, said stiffening member being of lesser cross sectional size than the opening in the material whereby this adjustment is permitted.

7. In a paper slotting machine, a horizontal table, a gage bar thereon having two parallel guideways, a knife having a cutting edge facing the table and an edge portion, means for moving the knife vertically both toward and away from the table and means for pivotally mounting the knife about a vertical axis so that the edge portion thereof may be moved into and guided by either one of the guideways.

8. In a paper slotting machine, a horizontal table, a gage bar on said table, a knife having a cutting edge facing the table, means for moving the knife and table toward and away from each other, guiding means on the gage bar, additional guiding means on the knife associated with the first mentioned guiding means and means for pivotally supporting the knife in a predetermined position whereby it may cut in at least two angular planes.

9. A paper cutting machine as set forth in claim 8 in which positive means is provided to hold the knife in one of its positions.

JAMES EDGAR LEE. JAMES WESLEY LEE. OLAF T. GYLLECK. FREEMAN BARNEY. 

